private void button3_Click(object sender, EventArgs e)
        {
            this.Hide();
            StaffLog1 Ed1 = new StaffLog1();

            Ed1.ShowDialog();
        }
        private void NMbtn_Click(object sender, EventArgs e)
        {
            this.Hide();
            StaffLog1 m2 = new StaffLog1();

            m2.ShowDialog();
        }